package Java高级day07网络编程.TCP和UDP协议;

import org.junit.Test;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * Created with IntelliJ IDEA.
 *
 * @author shkstart
 * @company 尚硅谷实习谷粉
 * @date 2022-01-16 10:11
 * @Description:
 * @name 李铭洋
 **/
public class TCPTest1 {

    //客户端
    @Test
    public void client()  {
        Socket socket= null;
        OutputStream os= null;
        try {
            //1.创建Socket对象，指明服务器端的ip和端口号
            InetAddress inet=InetAddress.getByName("127.0.0.1");
            socket = new Socket(inet,8899);

            //2.获取一个输出流，用于输出数据
            os = socket.getOutputStream();
            //3.写出数据的操作
            os.write("你好,我是客户端mm".getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //4.资源的关闭
            if (os!=null)
            {
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (socket!=null)
            {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    //服务端
    @Test
    public void server(){
        ServerSocket ss = null;
        Socket socket = null;
        InputStream is = null;
        ByteArrayOutputStream baos= null;
        try {
            //1.创建服务器端的ServerSocket，指明自己的端口号
            ss = new ServerSocket(8899);

            //2.调用accept()表示接收来自于客户端的socket
            socket = ss.accept();

            //3.获取输入流
            is = socket.getInputStream();

            //不建议这样写,可能会有乱码
//        byte[] buffer=new byte[1024];
//        int len;
//        while ((len=is.read(buffer))!=-1)
//        {
//            String str=new String(buffer,0,len);
//            System.out.print(str);
//        }

            //4.读取输入流中的数据
            baos = new ByteArrayOutputStream();
            byte[] buffer=new byte[5];
            int len;
            while ((len=is.read(buffer))!=-1)
            {
                baos.write(buffer,0,len);
            }
            System.out.println(baos.toString());
            System.out.println("收到了来自于:"+socket.getInetAddress().getHostAddress());
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //5.关闭资源
            if (baos!=null)
            {
                try {
                    baos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (is!=null)
            {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (socket!=null)
            {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (ss!=null)
            {
                try {
                    ss.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}
